手動註冊window service程式

執行程式如下：

加入service方式

c:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe C:\xxx\xxx.exe(執行程式名稱)

刪除service 

sc delete service名稱

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指令編譯C#

查詢指令

csc /help

編譯cs檔方式

C:\Windows\Microsoft.NET\Framework\v4.0.30319>csc /t:exe /out:c:\helloworld\hell
oworld.exe c:\helloworld\helloworld.cs

 

 

public class HelloWorld
{
    public static void Main(string[] args)
    {
        System.Console.WriteLine("Hello World!");
        System.Console.ReadLine();
    }
}

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Guid.NewGuid Enter Web Address is not work IE8

今天遇到使用Guid.NewGuid在IE8的奇怪問題
如果在網站列按Enter則會發生，但按F5重新整理確不會
最後確定是瀏覽器Cache問題造成的，我來重現一下實際的情況

測試程式如下：

 
protected void Page_Load(object sender, EventArgs e)
{
    Response.Write(Guid.NewGuid().ToString() );
}

這是個很簡單的產生Guidd語法，當IE8瀏覽器設定如下時：

則會發生Guid不會改變的情況，如下圖

解決方式：

Client端設定，不是個好方法。

比較好的解決 Server 端處理加入除清Cache語法，這樣就不會有Cache的問題囉

 
protected void Page_Load(object sender, EventArgs e)
{
    Response.Cache.SetNoStore(); //清除Cache
    Response.Write(Guid.NewGuid().ToString() );
}

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site map 取得自訂屬性

 

public class SiteMapMenu : HierarchicalDataBoundControl
{
  public void RecursiveCreateChildControls(IHierarchicalEnumerable dataItems, bool isRecursiveCall)
  {
      //抓取自訂屬性
      System.Web.SiteMapNode node = dataItem.Item as System.Web.SiteMapNode;
      bool customerTag = node["coustomerFlag"];

      if(customerTag) continue;
  }

}

//Web.sitemap

參考：https://msdn.microsoft.com/zh-tw/library/system.web.sitemapnode(v=vs.110).aspx

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將datareader取出資料轉成Enum型態

(CreationStatus)Enum.Parse(typeof(CreationStatus), dataReader["CreationStatus"].ToString());

 
private static List AddECEventLog(IDataReader dataReader)
{
 var ecEventLogList = new List();
 while (dataReader.Read())
 {
  var ecEventLog = new ECEventLog();
  ecEventLog.ECEventId = dataReader["ECEventId"] == DBNull.Value ? null : dataReader["ECEventId"].ToString();
  ecEventLog.CreationStatus = (CreationStatus)Enum.Parse(typeof(CreationStatus), dataReader["CreationStatus"].ToString());
  ecEventLogList.Add(ecEventLog);
 }
 return ecEventLogList;
}

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Func & Action 用法

Func & Action是委派用法，差別在於Func：有回傳值，Action：不需要回傳值

首先來看一下委派基本用法

 
    //委派基本定義
    public delegate string BaseDeletegate(string source);

    public static class ServiceBase
    {
        public static string Execute(BaseDeletegate action, string source)
        {
            string value = action.Invoke(source);
            return value;
        }
    }

    //呼叫委派用法
    public static void runBaseDeletegate()
    {
        BaseDeletegate action = ResponseMsg;
        string result = ServiceBase.Execute(action, "Neil");
        Console.WriteLine(result);
        Console.ReadLine();
    }

    //執行的方法
    public static string ResponseMsg(string str)
    {
        return "Hello:" + str;
    }

執行結果

改成用Func方法

 
    //Func定義
    public static string ExecuteFunc(Func action)
    {
        return action();  //有回傳值
    }

    //呼叫Func方法
    public static void runBaseFunc()
    {
        string result = ServiceBase.ExecuteFunc(() => {
            return ResponseMsg("FuncNeil");
        });
        Console.WriteLine(result);
        Console.ReadLine();
    }

    //執行的方法
    public static string ResponseMsg(string str)
    {
        return "Hello:" + str;
    }

執行結果：

改成用Action方法

 
    //Action定義
    public static void ExecuteAction(Action action)
    {
        action(); //沒有回傳值
    }

    //呼叫Action方法
    public static void runBaseAction()
    {
        ServiceBase.ExecuteAction(() => {
            ActionResopnseMsg("ActionNeil");
        });
    }

    //執行的方法
    public static void ActionResopnseMsg(string str)
    {
        Console.WriteLine("Hello:" + str);
        Console.ReadLine();
    }

執行結果：

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throw ex vs throw

寫了這麼久的程式，都沒特別注意到這二者的差別
簡單來說throw 會多一項原始執行錯誤行號。

• throw ex resets the stack trace (so your errors would appear to originate from HandleException)
• throw doesn't - the original offender would be preserved.

 
 static void Main(string[] args) {
  try {
   ThrowException1(); // line 19
  } catch (Exception x) {
   Console.WriteLine("Exception 1:");
   Console.WriteLine(x.StackTrace);
  }
  try {
   ThrowException2(); // line 25
  } catch (Exception x) {
   Console.WriteLine("Exception 2:");
   Console.WriteLine(x.StackTrace);
  }
 }

 private static void ThrowException1() {
  try {
   DivByZero(); // line 34
  } catch {
   throw; // line 36
  }
 }
 private static void ThrowException2() {
  try {
   DivByZero(); // line 41
  } catch (Exception ex) {
   throw ex; // line 43
  }
 }

 private static void DivByZero() {
  int x = 0;
  int y = 1 / x; // line 49
 }

輸出結果

Exception 1(throw):
at UnitTester.Program.DivByZero() in \Dev\UnitTester\Program.cs:line 49
at UnitTester.Program.ThrowException1() in \Dev\UnitTester\Program.cs:line 36
at UnitTester.Program.TestExceptions() in \Dev\UnitTester\Program.cs:line 19
Exception 2(throw ex):
at UnitTester.Program.ThrowException2() in \Dev\UnitTester\Program.cs:line 43
at UnitTester.Program.TestExceptions() in \Dev\UnitTester\Program.cs:line 25

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